I too have got off, flung the reins over the head to lead, then flung them back but crossed and then wondered why he wouldn't go where I was steering.
I was returning from a hack, and as is my habit I loosened the girth a couple of holes as I was riding into the yard/barn. I then forgot that I had done so...and leaned right over (to the left) to open a gate.
I was riding sidesaddle and so as I leaned over my saddle started to slip round to the left. As I had no right leg to push it back I just kept on slipping sideways until I was parallel with the ground. I then realised that I needed to 'unlock' my legs to enable myself to fall off, otherwise I would have ended up hanging upside down with my hat wedged on the concrete and my legs still in the saddle.
I unlocked and phlumped to the ground. Not a ladylike way to dismount.
Get up, get going, seize the day. Enjoy the sunshine, the rain, cloudy days, snowstorms, and thunder. Getting on your horse is always worth the effort.